Temp-485-Pt100 Frost2 - Low temperature measurement
€446.10
The RS-485 Temperature Sensor for Extreme Low Temperatures
The HW group Temp-485-Pt100 Frost2 is an industrial temperature sensor for very low temperatures with an RS-485 converter in a wall-mountable housing. The external Pt100 probe is housed in a robust stainless-steel enclosure and is connected to the converter via a 2-meter PTFE cable, allowing flexible access even to hard-to-reach measuring points.
The sensor covers a measuring range of -190 °C to +150 °C and is therefore specifically designed for cryogenic and low-temperature applications, for example in refrigeration systems, deep-freeze warehouses or laboratories. The converter is designed for connection to the Poseidon2 4002 monitoring system, which handles both the power supply and data transmission.
Thanks to the IP65 protection rating on the converter and IP67 on the probe, the Temp-485-Pt100 Frost2 is suitable for both indoor and outdoor use in demanding industrial environments.
Precise Measurement Down to -190 °C
The Temp-485-Pt100 Frost2 delivers reliable and accurate measured values even at extreme sub-zero temperatures.
Measuring Range -190 to +150 °C
Covers both extreme low temperatures and moderate positive ranges with a single probe.
High Accuracy
±(0.25 + 0.002|t|) °C in the range -50 to +150 °C, ±(0.4 + 0.005|t|) °C in the range -190 to -50 °C.
Pt100/Pt1000 Measuring Element
Measuring element according to EN 60751 / IEC 60751, known for high precision and long-term stability, resolution 0.1 °C.
IP65 / IP67
Converter protected to IP65, probe to IP67 – suitable for harsh industrial environments.
Low Power Consumption
Typically 2 mA in measuring mode, 60 mA during RS-485 transmission.
How the Temp-485-Pt100 Frost2 Is Built
The system consists of two parts: the external probe for the actual measurement and the wall-mountable converter for the RS-485 connection.
External Pt100 Probe
The measuring element is housed in a robust stainless-steel enclosure (material 17240) with a stem length of 50 mm and is protected to IP67. The probe is connected with 4 wires.
2-Meter PTFE Cable
A temperature-resistant PTFE cable connects the probe to the converter and allows flexible positioning of the probe at the actual measuring point.
Wall-Mountable Converter Housing
The converter is housed in an enclosure measuring 114 × 65 × 35 mm (W×H×D) with a total weight of 165 g and is protected to IP65 against dust and water jets.
RS-485 Connection
The converter is connected to the RS-485 bus infrastructure or to the Poseidon2 4002 via a terminal block (CUU 2.5 mm²) as well as an RJ11 connector.
DIP Switch
A DIP switch in the housing activates bus termination at the end of the RS-485 line if required.
Power Supply Connection
The voltage supply is also provided via the terminal block, either directly from the Poseidon2 4002 (12 V) or via an external source with 10 to 35 V DC, reverse-polarity protected.
Simple Integration via ASCII Protocol
The sensor communicates via a simple, text-based protocol that can be easily integrated into existing RS-485 installations.
- Communication via ASCII protocol at 9600 baud, 8N1
- Address configuration optionally via software or jumpers
- Bus termination can be activated via a DIP switch
- Stable data transmission even over longer distances on the RS-485 bus
Designed for the Poseidon2 4002
The Temp-485-Pt100 Frost2 is specifically designed for connection to the Poseidon2 4002 monitoring system.
- Poseidon2 4002 handles both the power supply (12–24 V) and data transmission
- Alternatively, the sensor can be operated with an external power source of 10–35 V DC
- Seamless integration into existing RS-485 sensor infrastructures
- Suitable for complex monitoring systems with real-time data and alarming
Straightforward Wall Installation
The converter is mounted on the wall, while the probe can be flexibly positioned at the actual measuring point thanks to the cable.
- Mount the converter housing on a suitable wall near the measuring point
- Attach the probe with its stainless-steel housing to the measuring object up to the desired immersion depth (recommended: at least 80 mm immersion depth for the specified accuracy)
- Connect the converter via terminal block or RJ11 to the RS-485 bus infrastructure or the Poseidon2 4002
- Set the bus address via software or jumper
- If required, activate bus termination via the DIP switch if the sensor is the last device on the RS-485 bus
- Connect the power supply via the Poseidon2 4002 or an external 10–35 V DC source
Why the Temp-485-Pt100 Frost2 Is Suitable
Low-Temperature Measurement
Extended measuring range of -190 °C to +150 °C, ideal for cryogenic applications.
Robust Construction
IP65 (converter) and IP67 (probe) ensure reliable operation in harsh environments.
Flexible Installation
The external probe with 2 m PTFE cable enables measurements at hard-to-reach locations.
High Precision
The Pt100 sensor delivers accurate measurements with a resolution of 0.1 °C.
Simple Compatibility
Seamless integration with the Poseidon2 4002 for power supply and data transmission.
Energy Efficiency
Low power consumption of typically 2 mA in measuring mode.
Areas of Application
- Temperature monitoring in the pharmaceutical or deep-freeze industry
- Cryogenic applications in laboratories or cryogenic systems
- Precise temperature monitoring in food processing
- Temperature monitoring in civil engineering and industrial furnaces
- Ensuring correct storage conditions in deep-freeze warehouses
- Monitoring of temperatures in refrigeration systems and industrial processes
The HW group Temp-485-Pt100 Frost2 combines a high-precision Pt100 probe for extreme sub-zero temperatures with a robust RS-485 connection to the Poseidon2 4002 – a reliable solution for low-temperature monitoring in industry, pharmaceuticals and research.
Frequently Asked Questions
What is the Temp-485-Pt100 Frost2 and what is it used for?
The Temp-485-Pt100 Frost2 is a temperature sensor for very low temperatures with RS-485 connection. It is used for the precise monitoring of extremely cold environments, for example in refrigeration systems, deep-freeze warehouses, the pharmaceutical industry or cryogenic laboratories.
What temperature range does the probe cover?
The Pt100 probe measures temperatures from -190 °C to +150 °C, with an accuracy of ±(0.25 + 0.002|t|) °C in the range -50 to +150 °C or ±(0.4 + 0.005|t|) °C in the range -190 to -50 °C.
Which device is the sensor compatible with?
The Temp-485-Pt100 Frost2 is designed for connection to the Poseidon2 4002 monitoring system, which handles both the power supply and data transmission.
Is the sensor also suitable for outdoor use?
Yes. The converter is protected to IP65 and the external probe to IP67, so the sensor can be used both indoors and outdoors.
How is the sensor powered?
Either directly via the Poseidon2 4002 with 12 V or via an external, reverse-polarity protected power source with 10 to 35 V DC.
How is the bus address set?
The address can be configured either via software or via jumpers. Termination of the RS-485 bus is activated via a DIP switch.
How long is the warranty?
The manufacturer HW group grants a warranty of 24 months.
Questions about the Temp-485-Pt100 Frost2?
Our support team in Germany provides free advice on selection, installation and configuration.
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Software
Manufacturer information:
HW group s. r. o.
Rumunská 26
Prague, 120 00
Czech Republic
Phone: +420 222 511 918
Email: sales@hwg.cz
Responsible person:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
